Davehal9000
New Member
Like many here I grabbed a TA-954 after seeing them used on Galactica. Being retired military and having used field phones a fair amount I figured it would be a cool toy for the boys and I to play with. Grabbed two of them and like everyone else figured out these aren't your traditional field phones that can run by running wires from one to another.
Plan B was to have the conversion done by A1. Problems were I couldn't never reach the guy and I wasn't sure just how much longer I'd even have a home landline.
Plan C... Got back to my original desire for this to be a home intercom system. I finally reached A1 and an option was to turn it into a real phone, then add a line emulator.
I ended up deciding to gut the 954 and transplant the guts of a commercial intercom system. I found a system called the Aiphone AT-406
When I initially bought the system there wasn't much in English available on them. Was finally able to get someone who spoke decent Engrish to clear things up. The AT-406 comes with two phones; the AT-206 master and the AT-306 slave. As many as 3 slaves can hook to the one master.
Gutted the master already and here it is.
And the slave...
Setup is simple; run a wire from terminal 1 on the master to 1 on the slave. Run a second wire between terminal 2 on master and slave. Load up four AA batteries, mount it to the wall and you're in operation. Pick up the handset, push the call button and wait for a response. Crystal clear and plenty loud.
Found a couple of interesting accessories to include an external power supply and a relay to hook the "ringer" to a doorbell!
With this in mind I went to work. My plan is to utilize the power connection and phone line connectors on the lower-right side of the 954 to hook up the power and phone lines to the Aiphone guts inside the 954. Am going to use the small PCB mounted to the side of the 954 with modification to connect it to the Aiphone.
Plan to remove all the uneeded components on the 954 main board and bolt the Aiphone board to it.
The handset should be easy. Will disassemble the Aiphone harness, run it through the H-250 handset and reassemble. Plan to use the original H-250 cord with the Aiphone wired to it in the handset. Anyone have suggestions on getting the H-250/H-350 speaker caps off without destroying them?
I have the power adapter and ringer relay on order. Need a second power adapter for the ringer. Am planning to record the ringtone from the DVD and use an MP3 player as the ringer. The prop phone will be in the basement in my office area but will be running the ringer out into my workshop.
Will be removing the original ringer LED and running a replacement from the Aiphone's ringer. Would like to be able to make it flash. Will see if I can add a brighter LED at least.
Had hoped I could use the original ringer on the 954 but to be frank I'm not even sure what I'm looking for...
Have run into a couple of issues. First is the call switch. My plan was to remove the DF2 switch and wire the CIC button on the key pad to it. Unfortunately the DF2 has all three of its terminals soldered to the PCB. Not sure how to address that. https://www.omron.com/ecb/products/pdf/en-d2f.pdf
The other is the hook switch. Plan was to the original reed switch in the phone but using my limited electrical training, a meter and a magnet I was unable to verify the switch worked. Ended up destroying it to remove it. Would like to run a new reed switch to the same original board in the same spot but the Aiphone hook switch has me stumped. It has 12 connectors to the PCB. 4 pole switch. Sounds to me like there's juice flowing no matter whether the hook switch is up or down. Not sure what to do there.
Anyway, looking forward to getting this thing going. The slave phone will be placed in the kitchen unmolested. Any advice or input is greatly appreciated!
Plan B was to have the conversion done by A1. Problems were I couldn't never reach the guy and I wasn't sure just how much longer I'd even have a home landline.
Plan C... Got back to my original desire for this to be a home intercom system. I finally reached A1 and an option was to turn it into a real phone, then add a line emulator.
I ended up deciding to gut the 954 and transplant the guts of a commercial intercom system. I found a system called the Aiphone AT-406
When I initially bought the system there wasn't much in English available on them. Was finally able to get someone who spoke decent Engrish to clear things up. The AT-406 comes with two phones; the AT-206 master and the AT-306 slave. As many as 3 slaves can hook to the one master.
Gutted the master already and here it is.
And the slave...
Setup is simple; run a wire from terminal 1 on the master to 1 on the slave. Run a second wire between terminal 2 on master and slave. Load up four AA batteries, mount it to the wall and you're in operation. Pick up the handset, push the call button and wait for a response. Crystal clear and plenty loud.
Found a couple of interesting accessories to include an external power supply and a relay to hook the "ringer" to a doorbell!
With this in mind I went to work. My plan is to utilize the power connection and phone line connectors on the lower-right side of the 954 to hook up the power and phone lines to the Aiphone guts inside the 954. Am going to use the small PCB mounted to the side of the 954 with modification to connect it to the Aiphone.
Plan to remove all the uneeded components on the 954 main board and bolt the Aiphone board to it.
The handset should be easy. Will disassemble the Aiphone harness, run it through the H-250 handset and reassemble. Plan to use the original H-250 cord with the Aiphone wired to it in the handset. Anyone have suggestions on getting the H-250/H-350 speaker caps off without destroying them?
I have the power adapter and ringer relay on order. Need a second power adapter for the ringer. Am planning to record the ringtone from the DVD and use an MP3 player as the ringer. The prop phone will be in the basement in my office area but will be running the ringer out into my workshop.
Will be removing the original ringer LED and running a replacement from the Aiphone's ringer. Would like to be able to make it flash. Will see if I can add a brighter LED at least.
Had hoped I could use the original ringer on the 954 but to be frank I'm not even sure what I'm looking for...
Have run into a couple of issues. First is the call switch. My plan was to remove the DF2 switch and wire the CIC button on the key pad to it. Unfortunately the DF2 has all three of its terminals soldered to the PCB. Not sure how to address that. https://www.omron.com/ecb/products/pdf/en-d2f.pdf
The other is the hook switch. Plan was to the original reed switch in the phone but using my limited electrical training, a meter and a magnet I was unable to verify the switch worked. Ended up destroying it to remove it. Would like to run a new reed switch to the same original board in the same spot but the Aiphone hook switch has me stumped. It has 12 connectors to the PCB. 4 pole switch. Sounds to me like there's juice flowing no matter whether the hook switch is up or down. Not sure what to do there.
Anyway, looking forward to getting this thing going. The slave phone will be placed in the kitchen unmolested. Any advice or input is greatly appreciated!
